Thanks for the query.
After removal of intrauterine device
it will take some time for regularization of cycles and for returning of ovulation.
Some women may ovulate as early as 2 weeks after removal and some may take loner period.
So as you started your periods you better track the ovulation in the month either by natural methods like cervical mucus method or ovulation kit.
Usually in case of regular ovulatory periods of 25 days duration ovulation is expected to occur around 11th day.
You plan unprotected intercourse
around that time which will increase the chances of pregnancy